Word: portulaca
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...remark able effects produced on plants by colchicine (TIME, Nov. 8, 1937). The drug causes a doubling of the chromosomes (heredity carriers) in the germ cells of vegetables and flowers, producing sharp changes which breed true. It increased the growth rates of tobacco, phlox, onions, pumpkins, cosmos, radishes, portulaca, digitalis. It abolished the neck in bottle neck squashes...
Colchicine. The major plant hormones already known are Auxins A and B and heteroauxin (TIME, Oct.11). Dr. Albert Francis Blakeslee, distinguished geneticist of the Carnegie Institution, reported discovery of a new plant hormone which he calls colchicine. It increases the growth rate of tobacco, phlox, onions, pumpkins, cosmos, radishes, portulaca, digitalis, jimson weed. The growth acceleration seems to be related to a doubling of certain segments of the chromosomes, heredity carriers in the germplasm. Colchicine also renders hybrid plants-which are normally sterile-fertile. Dr. Blakeslee pointed out that this action is as important in plant science as it would...
...glass, covers eight typewritten pages, can "go wrong in 40 ways," comes out striated with layers of green and white beneath the red. To approximate the colors with which pious artisans glorified God at Chartres and Poitiers, Artist Saint has cooked up messes of egg-yolk, hollyhock, calendula and portulaca. To get a certain yellow, Mr. Saint boiled a cow's hoof, as a medieval manuscript directed. So noisome was the process that Artist Saint had to yell for his sons to carry the bubbling hellbroth away...
| 1 |